Shaping tool and coupler

Abstract

The utility model discloses a reshaping tool and a coupling, and relates to the technical field of encoder processing structures, the reshaping tool is used for reshaping a main body of the coupling, the main body is provided with a mounting groove used for mounting a sliding block, the main body is further provided with a main body matching surface matched with the sliding block, the reshaping tool is configured to be mounted in the mounting groove, and the main body matching surface is matched with the sliding block. The shaping tool is provided with a shaping matching surface, and the shaping matching surface is configured to be in interference fit with the main body matching surface so as to shape the main body. According to the technical scheme provided by the utility model, the problem of low angle transmission precision caused by overlarge fit clearance or interference magnitude of the contact surface between the sliding block and the main body is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to encoder structure processing technical field, especially a kind of shaping tool and shaft coupling. BACKGROUND

[0002] In the field of mechatronics, precision transmission technology and plastic material engineering, the encoder is a commonly used sensor for converting mechanical displacement or angle into electrical signal. The shaft coupling is a key component connecting the encoder and the driving device, and its main function is to accurately transmit the position and displacement signal measured by the encoder to the driving device, thereby achieving precise control of the driving device.

[0003] In related technologies, the shaft coupling is usually installed in the sliding slot of the main body by the sliding block, and the contact surface between the sliding block and the main body is fitted to realize angular transmission. The relative sliding of the sliding block compensates for the different shafts of the encoder shaft and the driving shaft. However, the fitting of the sliding block and the main body is easily affected by manufacturing and processing errors, assembly errors and working environment factors, resulting in too large fitting gap or interference between the contact surface of the sliding block and the main body, thereby affecting the angular transmission accuracy of the encoder. SUMMARY

[0004] The main purpose of the utility model is to provide a shaping tool and shaft coupling, which aims to solve the problem of low angular transmission accuracy caused by too large fitting gap or interference between the contact surface of the sliding block and the main body.

[0005] To achieve the above purpose, the utility model provides a shaping tool for shaping the main body of the shaft coupling. The main body is provided with a mounting slot for mounting the sliding block. The main body is also provided with a main body fitting surface cooperating with the sliding block. The shaping tool is configured to be installed in the mounting slot. The shaping tool is provided with a shaping fitting surface. The shaping fitting surface is configured to be interference-fitted with the main body fitting surface to shape the main body.

[0006] In an embodiment, the shaping tool is provided with a shaping slot, and the slot side wall of the shaping slot is provided with the shaping fitting surface. And / or, the outer side wall of the shaping tool is provided with the shaping fitting surface.

[0007] In an embodiment, the mounting slot is provided with a boss, and the side surface of the boss is provided with the main body fitting surface. The shaping tool is provided with a shaping slot, and the slot side wall of the shaping slot is provided with the shaping fitting surface. The boss is inserted into the shaping slot.

[0008] In an embodiment, the main body has a central axis, two of the bosses are symmetrically distributed along the central axis of the main body, one of the bosses is provided with a first mating surface and a second mating surface arranged oppositely, and the other of the bosses is provided with a third mating surface and a fourth mating surface arranged oppositely, and the main body mating surface comprises the first mating surface, the second mating surface, the third mating surface and the fourth mating surface.

[0009] The slot side wall of the shaping slot is provided with a first shaping surface and a second shaping surface arranged oppositely, and a third shaping surface and a fourth shaping surface arranged oppositely, the shaping mating surface comprises the first shaping surface, the second shaping surface, the third shaping surface and the fourth shaping surface, the first shaping surface is configured to be interference-fitted with the first mating surface, the second shaping surface is configured to be interference-fitted with the second mating surface, the third shaping surface is configured to be interference-fitted with the third mating surface, and the fourth shaping surface is configured to be interference-fitted with the fourth mating surface.

[0010] In an embodiment, the slot side wall of the shaping slot is provided with the shaping mating surface, and the outer side wall of the shaping tool is configured to be gap-fitted with the slot side wall of the mounting slot.

[0011] In an embodiment, the outer side wall of the shaping tool is provided with the shaping mating surface, and the side wall of the mounting slot is provided with the main body mating surface.

[0012] In an embodiment, the side wall of the mounting slot is provided with a first mating surface and a second mating surface arranged oppositely, and a third mating surface and a fourth mating surface arranged oppositely, and the main body mating surface comprises the first mating surface, the second mating surface, the third mating surface and the fourth mating surface.

[0013] The outer side wall of the shaping tool is provided with a first shaping surface and a second shaping surface arranged oppositely, and a third shaping surface and a fourth shaping surface arranged oppositely, the shaping mating surface comprises the first shaping surface, the second shaping surface, the third shaping surface and the fourth shaping surface, the first shaping surface is configured to be interference-fitted with the first mating surface, the second shaping surface is configured to be interference-fitted with the second mating surface, the third shaping surface is configured to be interference-fitted with the third mating surface, and the fourth shaping surface is configured to be interference-fitted with the fourth mating surface.

[0014] In an embodiment, the frictional force between the shaping mating surface and the main body mating surface is 5N-15N.

[0015] To achieve the above object, the utility model further provides a coupling, comprising:

[0016] A main body, opposite ends of the main body are provided with mounting slots, and the main body is further provided with a main body matching surface; the main body is configured to be shaped in advance by a shaping tool, and a shaping matching surface of the shaping tool is configured to be in interference fit with the main body matching surface;

[0017] Two sliders, the two sliders are respectively installed in the two mounting slots, and the sliders are provided with slider matching surfaces, the slider matching surfaces are in interference fit with the main body matching surface, and the sliders can slide relative to the main body.

[0018] In an embodiment, the mounting slots are provided with bosses, side walls of the bosses are provided with the main body matching surfaces, the sliders are provided with grooves, groove side walls of the grooves are provided with the slider matching surfaces, and the bosses are inserted into the grooves;

[0019] Outer side walls of the sliders are in clearance fit with groove side walls of the mounting slots;

[0020] The mounting slots and the sliders extend along a first direction, in the first direction, the side walls of the bosses are in clearance fit with the groove side walls of the grooves, so that the sliders can slide relative to the main body in the first direction;

[0021] In an embodiment, a width of a shaping groove of the shaping tool is greater than a width of the groove;

[0022] And / or, a groove mouth edge of the groove is provided with a rounded corner.

[0023] In an embodiment, the main body has a central axis, the mounting slots are provided with two bosses, the two bosses are symmetrically distributed along the central axis of the main body, one of the bosses is provided with oppositely arranged first and second matching surfaces, and the other boss is provided with oppositely arranged third and fourth matching surfaces, and the main body matching surface includes the first, second, third and fourth matching surfaces;

[0024] The slider has a central axis, two sides of the slider are respectively provided with two grooves, the two grooves are symmetrically distributed along the central axis of the slider, one of the grooves is provided with oppositely arranged first and second slider matching surfaces, and the other groove is provided with oppositely arranged third and fourth slider matching surfaces, and the slider matching surface includes the first, second, third and fourth slider matching surfaces;

[0025] The first slider matching surface is in interference fit with the first matching surface, the second slider matching surface is in interference fit with the second matching surface, the third slider matching surface is in interference fit with the third matching surface, and the fourth slider matching surface is in interference fit with the fourth matching surface.

[0026] In an embodiment, the outer side wall of the slider is clearance fit with the slot side wall of the mounting slot.

[0027] In an embodiment, the side wall of the mounting slot is provided with oppositely arranged first and second fit faces and oppositely arranged third and fourth fit faces, and the body fit faces include the first, second, third and fourth fit faces.

[0028] The slider has a central axis, and the outer side wall of the slider is provided with oppositely arranged first and second slider fit faces and oppositely arranged third and fourth slider fit faces, and the slider fit faces include the first, second, third and fourth slider fit faces.

[0029] The first slider fit face is interference fit with the first fit face, the second slider fit face is interference fit with the second fit face, the third slider fit face is interference fit with the third fit face, and the fourth slider fit face is interference fit with the fourth fit face.

[0030] In an embodiment, the thickness of the shaping tool is greater than the depth of the mounting slot.

[0031] And / or, the body fit faces are provided with oil storage grooves.

[0032] And / or, the slider is provided with an axle hole for mounting an axle, the axle hole has a central axis, and the slider fit faces are parallel to the central axis of the axle hole.

[0033] The technical scheme of the utility model adopts the shaping tool to first shape the body of the shaft coupling, specifically installs the shaping tool in the mounting slot of the body, and then interference fits the shaping fit faces of the shaping tool with the body fit faces of the body, and then heats the shaping tool and the body, cools to room temperature after heating, tests the friction force of the shaping tool and the body, controls the friction force between the shaping fit faces and the body fit faces within a preset range, and the shaping of the body is completed. The shaped body can be installed with the slider of the shaft coupling, the contact surface fit clearance or interference amount between the slider and the body is controlled within a preset range, and the problem of low angular transmission precision caused by excessive contact surface fit clearance or interference amount between the slider and the body can be solved by shaping. BRIEF DESCRIPTION OF DRAWINGS

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0035] Figure 1 A schematic diagram of the structure of an embodiment of the shaping fixture provided by this utility model;

[0036] Figure 2 A schematic diagram of the structure of an embodiment of the shaping fixture provided by this utility model during shaping;

[0037] Figure 3 A front view of an embodiment of the shaping fixture provided by this utility model during shaping;

[0038] Figure 4 A rear view of an embodiment of the shaping fixture provided by this utility model during shaping;

[0039] Figure 5 A schematic diagram of the structure of an embodiment of the shaping fixture provided by this utility model during friction testing;

[0040] Figure 6 A schematic diagram of the structure of an embodiment of the shaping fixture provided by this utility model during friction testing;

[0041] Figure 7 A schematic diagram of a structure of an embodiment of the coupling provided by this utility model;

[0042] Figure 8 A front view of an embodiment of the coupling provided by this utility model;

[0043] Figure 9 Rear view of an embodiment of the coupling provided by this utility model;

[0044] Figure 10 A schematic diagram of the main body of a coupling provided by this utility model;

[0045] Figure 11 A front view of the main body in one embodiment of the coupling provided by this utility model;

[0046] Figure 12 A rear view of the main body in one embodiment of the coupling provided by this utility model;

[0047] Figure 13 A schematic diagram of the slider structure in one embodiment of the coupling provided by this utility model;

[0048] Figure 14 A front view of the slider in one embodiment of the coupling provided by this utility model;

[0049] Figure 15 A schematic diagram of another embodiment of the shaping fixture provided by this utility model;

[0050] Figure 16 This is a schematic diagram of the structure of another embodiment of the shaping fixture provided by this utility model during shaping.

[0051] Explanation of icon numbers:

[0052]

[0053]

[0054] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0055] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0056] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0057] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0058] In the fields of mechatronics, precision transmission technology, and plastics engineering, encoders are commonly used sensors to convert mechanical displacement or angle into electrical signals. Couplings are key components connecting encoders and drive equipment; their main function is to accurately transmit the position and displacement signals measured by the encoder to the drive equipment, thereby achieving precise control of the drive equipment.

[0059] In related technologies, couplings typically employ a slider mounted in a groove within the main body. Angular transmission is achieved by ensuring the contact surfaces of the slider and the main body are in close contact, and the relative sliding of the slider compensates for the misalignment between the encoder shaft and the drive shaft. However, the fit between the slider and the main body is susceptible to manufacturing errors, assembly errors, and environmental factors, leading to excessive clearance or interference between the contact surfaces and thus affecting the encoder's angular transmission accuracy.

[0060] Based on the above problems, this utility model proposes a shaping fixture 10, which aims to solve the problem of low angle transmission accuracy caused by excessive gap or interference between the contact surface between the slider 22 and the main body 21.

[0061] Please see Figures 1 to 6 In one embodiment of the present invention, the shaping fixture 10 is used to shape the main body 21 of the coupling 20. The main body 21 is provided with a mounting groove 211 for mounting the slider 22, and the main body 21 is also provided with a main body mating surface 212 that cooperates with the slider 22. The shaping fixture 10 is configured to be installed in the mounting groove 211. The shaping fixture 10 is provided with a shaping mating surface 11, which is configured to be interference-fitted with the main body mating surface 212 to shape the main body 21.

[0062] The technical solution of this utility model involves using a shaping fixture 10 to first shape the main body 21 of the coupling 20. Specifically, the shaping fixture 10 is installed in the mounting groove 211 of the main body 21, and the shaping mating surface 11 of the shaping fixture 10 is interference-fitted with the main body mating surface 212 of the main body 21. Then, the shaping fixture 10 and the main body 21 are heated, and after heating, they are cooled to room temperature. By conducting a friction test on the shaping fixture 10 and the main body 21, the friction between the shaping mating surface 11 and the main body mating surface 212 is controlled within a preset range, thus completing the shaping of the main body 21. After shaping, the main body 21 can be fitted and installed with the slider 22 of the coupling 20, so that the contact surface clearance or interference between the slider 22 and the main body 21 is controlled within a preset range. This solves the problem of low angular transmission accuracy caused by excessive contact surface clearance or interference between the slider 22 and the main body 21 through shaping.

[0063] In this embodiment, the method for shaping the main body 21 using the shaping fixture 10 is as follows: the shaping fixture 10 is pressed into the mounting groove 211 of the main body 21, and then the shaping fixture 10 and the main body 21 are placed in an oven for heat shaping. Then, the shaping fixture 10 and the main body 21 are placed together in the air to cool completely to room temperature. Finally, a push-pull force gauge is used to test the frictional force between the main body mating surface 212 of the main body 21 and the shaping mating surface 11 of the shaping fixture 10 in various directions. For the frictional force testing method, please refer to [link to relevant documentation]. Figure 5 and Figure 6 As shown, the friction between the main body mating surface 212 and the shaping mating surface 11 is controlled within a preset range. Finally, the shaping fixture 10 is removed from the main body 21, and the slider 22 is installed into the mounting groove 211 of the main body 21, so that the coupling 20 can be used normally.

[0064] Of course, in other embodiments, the method of testing the interference between the main mating surface 212 and the shaping mating surface 11 by friction can be tested by using a coordinate measuring machine or an optical profilometer to detect the size and parallelism of the main mating surface 212.

[0065] Optionally, in order to improve the shaping accuracy of the shaping fixture 10 on the main body 21, the shaping mating surface 11 of the shaping fixture 10 and the slider mating surface 221 of the slider 22 can have the same shape, size and other parameters.

[0066] In practical applications, the shaping mating surface 11 of the shaping fixture 10 can be set on the side wall of the shaping groove 12 or on the outer side wall of the shaping fixture 10. The specific matching can be made according to the position of the main mating surface 212.

[0067] In one embodiment of this utility model, please refer to Figures 1 to 6 The shaping fixture 10 is provided with a shaping groove 12, and the sidewall of the shaping groove 12 is provided with a shaping mating surface 11; and / or, please refer to Figure 15 , Figure 16 The outer wall of the shaping fixture 10 is provided with a shaping mating surface 11.

[0068] With this configuration, the forming mating surface 11 can be set on the side wall of the forming groove 12 and / or on the outer wall of the forming fixture 10, depending on the location of the main body mating surface 212 on the main body 21, so that the forming mating surface 11 and the main body mating surface 212 can achieve an interference fit, thereby effectively shaping the main body 21.

[0069] It is understandable that the forming mating surface 11 may be provided only on the side wall of the forming groove 12; or the forming mating surface 11 may be provided only on the outer side wall of the forming fixture 10; or the forming mating surface 11 may be provided on both the side wall of the forming groove 12 and the outer side wall of the forming fixture 10.

[0070] Please seeFigures 1 to 6 In one embodiment of the present invention, a boss 213 is provided in the mounting groove 211, and a main body mating surface 212 is provided on the side of the boss 213. The shaping tooling 10 is provided with a shaping groove 12, and a shaping mating surface 11 is provided on the side wall of the shaping groove 12. The boss 213 is inserted into the shaping groove 12.

[0071] With this configuration, by providing a shaping groove 12 on the shaping fixture 10, when the shaping fixture 10 is pressed into the mounting groove 211, the boss 213 can be inserted into the shaping groove 12, so that the shaping fixture 10 can be smoothly pressed into the mounting groove 211 of the main body 21. At the same time, the shaping mating surface 11 on the side wall of the shaping groove 12 is interference-fitted with the main body mating surface 212 on the main body 21 to shape the main body 21.

[0072] In practical applications, the mounting groove 211 may have one or at least two bosses 213, and the main mating surface 212 on the boss 213 may be one surface or at least two surfaces; correspondingly, the shaping mating surface 11 on the shaping fixture 10 may also be one surface or at least two surfaces, as long as each surface of the main mating surface 212 can be interference-fitted with the shaping mating surface 11.

[0073] Please see Figures 1 to 4 In one embodiment of this utility model, the main body 21 has a central axis, and two bosses 213 are provided in the mounting groove 211. The two bosses 213 are symmetrically distributed along the central axis of the main body 21. One boss 213 has a first mating surface 212a and a second mating surface 212b arranged opposite to each other, and the other boss 213 has a third mating surface 212c and a fourth mating surface 212d arranged opposite to each other. The main body mating surface 212 includes the first mating surface 212a, the second mating surface 212b, the third mating surface 212c, and the fourth mating surface 212d. The sidewall of the shaping groove 12 has oppositely arranged... The first shaping surface 11a, the second shaping surface 11b, and the third shaping surface 11c and the fourth shaping surface 11d arranged opposite to each other, the shaping mating surface 11 includes the first shaping surface 11a, the second shaping surface 11b, the third shaping surface 11c and the fourth shaping surface 11d. The first shaping surface 11a is configured to have an interference fit with the first mating surface 212a, the second shaping surface 11b is configured to have an interference fit with the second mating surface 212b, the third shaping surface 11c is configured to have an interference fit with the third mating surface 212c, and the fourth shaping surface 11d is configured to have an interference fit with the fourth mating surface 212d.

[0074] With this configuration, since the mounting groove 211 has two bosses 213, and the two bosses 213 have a total of four mating surfaces 212a, 212b, 212c, and 212d that mate with the slider 22, by providing the first shaping surface 11a, the second shaping surface 11b, the third shaping surface 11c, and the fourth shaping surface 11d on the sidewall of the shaping groove 12, when the shaping fixture 10 is pressed into the mounting groove 211, the first mating surface 212a and the second shaping surface 212b can be mated with the slider 22. Surfaces 212b, 212c, and 212d are respectively interference-fitted with the first shaping surface 11a, 11b, 11c, and 11d. This allows the first shaping surface 11a, 11b, 11c, and 11d to shape the first, second, 212b, 212c, and 212d respectively, ensuring that the friction between each pair of mating surfaces remains within a preset range. After the shaped body 21 is fitted and installed with the slider 22, the contact gap or interference between the slider 22 and the body 21 is controlled within a preset range, effectively solving the problem of low angle transmission accuracy caused by excessive contact gap or interference between the slider 22 and the body 21.

[0075] It should be noted that when the first mating surface 212a and the third mating surface 212c are coplanar, and the second mating surface 212b and the fourth mating surface 212d are coplanar, then the first shaping surface 11a and the third shaping surface 11c are coplanar, and the second shaping surface 11b and the fourth shaping surface 11d are coplanar.

[0076] Please see Figures 2 to 5 In one embodiment of the present invention, the side wall of the shaping groove 12 is provided with a shaping mating surface 11, and the outer side wall of the shaping fixture 10 is configured to have a clearance fit with the side wall of the mounting groove 211. This configuration makes it easier to press the shaping fixture 10 into the mounting groove 211 of the main body 21.

[0077] Please see Figure 15 , Figure 16 In another embodiment of the present invention, the outer side wall of the shaping fixture 10 is provided with a shaping mating surface 11, and the side wall of the mounting groove 211 is provided with a main body mating surface 212.

[0078] Since the mounting groove 211 of the main body 21 in this embodiment is a strip groove, there is no boss 213 blocking the shaping fixture 10 in the mounting groove 211, and the main body mating surface 212 is directly set on the groove wall of the mounting groove 211, the shaping mating surface 11 can be directly set on the outer side wall of the shaping fixture 10. When the shaping fixture 10 is pressed into the mounting groove 211 of the main body 21, the shaping mating surface 11 on the outer side wall of the shaping fixture 10 can be interference-fitted with the main body mating surface 212 on the side wall of the mounting groove 211 to shape the main body 21.

[0079] In practical applications, the main mating surface 212 on the side wall of the mounting groove 211 can be one surface or at least two surfaces; correspondingly, the shaping mating surface 11 on the outer side wall of the shaping fixture 10 can also be one surface or at least two surfaces, as long as each surface of the main mating surface 212 can be interference-fitted with the shaping mating surface 11.

[0080] Please see Figure 15 , Figure 16 In another embodiment of this utility model, the sidewall of the mounting groove 211 is provided with a first mating surface 212a and a second mating surface 212b, and a third mating surface 212c and a fourth mating surface 212d, which are arranged opposite to each other. The main mating surface 212 includes the first mating surface 212a, the second mating surface 212b, the third mating surface 212c, and the fourth mating surface 212d. The outer sidewall of the shaping fixture 10 is provided with a first shaping surface 11a and a second shaping surface 11b, and a third mating surface 212c and a fourth mating surface 212d, which are arranged opposite to each other. The three shaping surfaces 11c and 11d, the shaping mating surface 11 includes a first shaping surface 11a, a second shaping surface 11b, a third shaping surface 11c and a fourth shaping surface 11d. The first shaping surface 11a is configured to have an interference fit with the first mating surface 212a, the second shaping surface 11b is configured to have an interference fit with the second mating surface 212b, the third shaping surface 11c is configured to have an interference fit with the third mating surface 212c, and the fourth shaping surface 11d is configured to have an interference fit with the fourth mating surface 212d.

[0081] With this configuration, since the sidewall of the mounting groove 211 has a total of four mating surfaces—a first mating surface 212a, a second mating surface 212b, a third mating surface 212c, and a fourth mating surface 212d—that mate with the slider 22, the shaping fixture 10 also has a first shaping surface 11a, a second shaping surface 11b, a third shaping surface 11c, and a fourth shaping surface 11d on its outer sidewall. Therefore, when the shaping fixture 10 is pressed into the mounting groove 211, the first mating surface 212a, the second mating surface 212b, the third shaping surface 212c, and the fourth shaping surface 212d can be properly aligned. The mating surfaces 212c and 212d are respectively interference-fitted with the first shaping surface 11a, the second shaping surface 11b, the third shaping surface 11c, and the fourth shaping surface 11d. This allows the first shaping surface 11a, the second shaping surface 11b, the third shaping surface 11c, and the fourth shaping surface 11d to shape the first mating surface 212a, the second mating surface 212b, the third mating surface 212c, and the fourth mating surface 212d, thereby keeping the friction between each pair of mating surfaces within a preset range. After the shaped body 21 is fitted and installed with the slider 22, the contact gap or interference between the slider 22 and the body 21 can be controlled within a preset range, effectively solving the problem of low angle transmission accuracy caused by excessive contact gap or interference between the slider 22 and the body 21.

[0082] Please see Figure 5 , Figure 6 In one embodiment of this utility model, the frictional force between the shaping mating surface 11 and the main mating surface 212 is 5N to 15N.

[0083] This configuration, using the shaping fixture 10 to control the friction between the shaping mating surface 11 and the main body mating surface 212 to between 5N and 15N, ensures that when the shaping fixture 10 is removed from the main body 21 and the slider 22 is installed into the mounting groove 211 of the main body 21, the friction between the slider mating surface 221 and the main body mating surface 212 of the slider 22 is also controlled between 5N and 15N. This maintains a slight interference fit between the slider 22 and the main body 21, meaning that the slider 22 and the main body 21 can slide smoothly relative to each other without separating under a small force. This effectively solves the problem of low angular transmission accuracy caused by excessive clearance or interference between the contact surfaces of the slider 22 and the main body 21. Therefore, when the coaxiality of the two shafts is poor, the possibility of the coupling 20 jamming during operation is avoided, which not only extends the product's lifespan but also improves its reliability.

[0084] As examples, the frictional force between the shaping mating surface 11 and the main mating surface 212 can be 5N, 6N, 7N, 8N, 9N, 10N, 11N, 12N, 13N, 14N, 15N, etc.

[0085] Please see Figures 7 to 14 The present invention also proposes a coupling 20, which includes a main body 21 and two sliders 22. The main body 21 is configured to be pre-shaped by a shaping fixture 10. The specific structure of the shaping fixture 10 is as described in the above embodiments. Since the coupling adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0086] The shaping fixture 10 has a shaping mating surface 11; the main body 21 has mounting grooves 211 at both opposite ends, and the main body 21 also has a main body mating surface 212; the shaping mating surface 11 of the shaping fixture 10 is configured to have an interference fit with the main body mating surface 212; two sliders 22 are respectively installed in the two mounting grooves 211, and the sliders 22 have slider mating surfaces 221, which have an interference fit with the main body mating surface 212, and the sliders 22 can slide relative to the main body 21.

[0087] Understandably, the forming fixture 10 is used to first shape the body 21 of the coupling 20. Specifically, the forming fixture 10 is installed in the mounting groove 211 of the body 21, and the forming mating surface 11 of the forming fixture 10 is interference-fitted with the main mating surface 212 of the body 21. Then, the forming fixture 10 and the body 21 are heated, and after heating, they are cooled to room temperature. By conducting a friction test on the forming fixture 10 and the body 21, the friction between the forming mating surface 11 and the main mating surface 212 is controlled within a preset range, thus completing the shaping of the body 21. After shaping, the body 21 can be fitted and installed with the slider 22 of the coupling 20, so that the contact surface clearance or interference between the slider 22 and the body 21 is controlled within a preset range. This way, the problem of low angular transmission accuracy caused by excessive contact surface clearance or interference between the slider 22 and the body 21 can be solved by shaping.

[0088] Please see Figure 13 , Figure 14 In one embodiment of this utility model, a boss 213 is provided in the mounting groove 211, and a main body mating surface 212 is provided on the side wall of the boss 213. The slider 22 is provided with a groove 222, and a slider mating surface 221 is provided on the side wall of the groove 222. The boss 213 is inserted into the groove 222. The outer side wall of the slider 22 is in clearance fit with the side wall of the mounting groove 211. The mounting groove 211 and the slider 22 extend along a first direction. In the first direction, the side wall of the boss 213 is in clearance fit with the side wall of the groove 222, so that the slider 22 can slide relative to the main body 21 in the first direction.

[0089] This configuration allows the slider 22 and the main body 21 to slide relative to each other in the first direction, which can compensate for the deviation in the coaxiality of the two shafts and avoid the possibility of the coupling 20 getting stuck during operation.

[0090] It should be noted that the two mounting slots 211 may extend in the same or different directions, and correspondingly, the two sliders 22 may extend in the same or different directions.

[0091] Please see Figures 7 to 14 In one embodiment of this utility model, the width of the shaping groove 12 of the shaping fixture 10 is greater than the width of the groove 222.

[0092] With this configuration, during the heat forming process of the main body 21 using the forming fixture 10, the main body 21 will undergo thermal expansion and contraction. By making the width of the forming groove 12 of the forming fixture 10 greater than the width of the groove 222 on the slider 22, a small gap exists between the side wall of the forming groove 12 and the boss 213 after cooling, making it easy to remove the forming fixture 10. Since the width of the groove 222 is less than the width of the forming groove 12 of the forming fixture 10, when the slider 22 is pressed into the mounting groove 211, it can be ensured that the slider mating surface 221 of the slider 22 and the main body mating surface 212 are kept in a state of slight interference fit.

[0093] Optionally, please refer to Figure 8 , Figure 9 One mounting groove 211 and a slider 22 can be arranged to extend along a first direction, with the slider 22 sliding relative to the body 21 in the first direction relative to the boss 213 on the mounting groove 211; and another mounting groove 211 and another slider 22 can extend along a second direction, with the slider 22 sliding relative to the body 21 in the second direction relative to the boss 213 on the mounting groove 211. That is, the extension directions of the two mounting grooves 211 are set at an angle. This design allows the two sliders 22, which are respectively installed in the two mounting grooves 211, to slide relative to the body 21 in different directions, which can better compensate for the deviation when the two axes are not aligned.

[0094] Optionally, the included angle between the extension directions (first direction and second direction) of the two mounting slots 211 can be 45° to 135°, for example, 45°, 60°, 90°, 120°, 135°, etc.

[0095] Please see Figure 13 , Figure 14 In one embodiment of this utility model, the groove 222 has a rounded corner 2221 at the edge of the groove opening.

[0096] With this configuration, friction will occur between the slider 22 and the main body 21 during the process of pressing the slider 22 into the mounting groove 211 of the main body 21. Therefore, the design of the rounded corner 2221 can prevent the slider 22 from scratching the surface of the plastic main body 21 and reduce the wear on the main body 21.

[0097] Please see Figures 7 to 14 In one embodiment of this utility model, the main body 21 has a central axis, and two bosses 213 are provided in the mounting groove 211. The two bosses 213 are symmetrically distributed along the central axis of the main body 21. One boss 213 has a first mating surface 212a and a second mating surface 212b that are arranged opposite to each other, and the other boss 213 has a third mating surface 212c and a fourth mating surface 212d that are arranged opposite to each other. The main body mating surface 212 includes the first mating surface 212a, the second mating surface 212b, the third mating surface 212c, and the fourth mating surface 212d. The slider 22 has a central axis, and two grooves 222 are provided on both sides of the slider 22. The two grooves 222 are symmetrically distributed along the central axis of the slider 22. 222 has a first slider mating surface 221a and a second slider mating surface 221b arranged opposite to each other, and another groove 222 has a third slider mating surface 221c and a fourth slider mating surface 221d arranged opposite to each other. The slider mating surface 221 includes the first slider mating surface 221a, the second slider mating surface 221b, the third slider mating surface 221c, and the fourth slider mating surface 221d. The first slider mating surface 221a is interference-fitted with the first mating surface 212a, the second slider mating surface 221b is interference-fitted with the second mating surface 212b, the third slider mating surface 221c is interference-fitted with the third mating surface 212c, and the fourth slider mating surface 221d is interference-fitted with the fourth mating surface 212d.

[0098] With this configuration, after the slider 22 is pressed into the mounting groove 211 of the main body 21, the first mating surface 212a, the second mating surface 212b, the third mating surface 212c, and the fourth mating surface 212d on the two bosses 213 can be interference-fitted with the first slider mating surface 221a, the second slider mating surface 221b, the third slider mating surface 221c, and the fourth slider mating surface 221d, respectively. This allows the slider 22 and the main body 21 to maintain a slightly interference fit, meaning that the slider 22 and the main body 21 can slide smoothly relative to each other without separating after being subjected to a small force. This avoids the possibility of the coupling 20 jamming during operation when the coaxiality of the two shafts is very poor.

[0099] Please see Figures 7 to 9 In one embodiment of this utility model, the outer wall of the slider 22 is clearance-fitted with the side wall of the mounting groove 211.

[0100] This design reduces the contact area between the slider 22 and the main body 21, making it easier for the slider 22 to maintain a relatively stable state with the main body 21.

[0101] In another embodiment of this utility model, the sidewall of the mounting groove 211 is provided with a first mating surface 212a and a second mating surface 212b, and a third mating surface 212c and a fourth mating surface 212d, which are arranged opposite to each other. The main body mating surface 212 includes the first mating surface 212a, the second mating surface 212b, the third mating surface 212c, and the fourth mating surface 212d. The slider 22 has a central axis, and the outer sidewall of the slider 22 is provided with a first slider mating surface 221a and a second slider mating surface 221b, and a third mating surface 212c and a fourth mating surface 212d, which are arranged opposite to each other. The slider mating surfaces 221c and 221d are three slider mating surfaces. The slider mating surfaces 221 include a first slider mating surface 221a, a second slider mating surface 221b, a third slider mating surface 221c, and a fourth slider mating surface 221d. The first slider mating surface 221a is interference-fitted with the first mating surface 212a, the second slider mating surface 221b is interference-fitted with the second mating surface 212b, the third slider mating surface 221c is interference-fitted with the third mating surface 212c, and the fourth slider mating surface 221d is interference-fitted with the fourth mating surface 212d.

[0102] With this configuration, after the slider 22 is pressed into the mounting groove 211 of the main body 21, the first mating surface 212a, the second mating surface 212b, the third mating surface 212c, and the fourth mating surface 212d on the side wall of the mounting groove 211 can also be interference-fitted with the first slider mating surface 221a, the second slider mating surface 221b, the third slider mating surface 221c, and the fourth slider mating surface 221d, respectively. This allows the slider 22 and the main body 21 to maintain a slightly interference fit, meaning that the slider 22 and the main body 21 can slide smoothly relative to each other without separating after being subjected to a small force. When the coaxiality of the two shafts is very poor, this avoids the possibility of the coupling 20 getting stuck during operation.

[0103] Please see Figure 2 In one embodiment of this utility model, the thickness of the shaping fixture 10 is greater than the depth of the mounting groove 211. That is, when the shaping fixture 10 is pressed into the mounting groove 211, part of the shaping fixture 10 protrudes outside the mounting groove 211.

[0104] This design prevents the mounting groove 211 of the main body 21 from having a "trumpet mouth" shape, ensuring high parallelism of the main body mating surface 212, thereby preventing uneven friction between the main body mating surface 212 and the slider mating surface 221.

[0105] Please see Figure 10In one embodiment of this utility model, the main body mating surface 212 is provided with an oil storage tank 214.

[0106] With this design, the oil reservoir 214 can be used to store lubricating oil, which can reduce the friction between the main body mating surface 212 and the slider mating surface 221, so that the slider 22 and the main body 21 can be better kept in a slightly interference fit state.

[0107] In one embodiment, the shaping mating surface 11 of the shaping fixture 10 and the slider mating surface 221 of the slider 22 need to be set to a small surface roughness, for example, a surface roughness of less than 0.8 μm. This can reduce the friction between the shaping mating surface 11 and the main mating surface 212 during the shaping process, and at the same time reduce the friction between the slider mating surface 221 and the main mating surface 212 during assembly and use.

[0108] Please see Figure 8 , Figure 9 In one embodiment of the present invention, the slider 22 is provided with a shaft hole for mounting a shaft, the shaft hole has a central axis, and the slider mating surface 221 is parallel to the central axis of the shaft hole.

[0109] This configuration allows the slider mating surface 221 to maintain a high degree of parallelism, which better ensures that the slider mating surface 221 and the main body mating surface 212 of the slider 22 are in a state of slight interference fit. This allows the slider 22 and the main body 21 to slide smoothly relative to each other without separating after being subjected to a small force.

[0110] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A sizing tool for sizing a main body of a coupling, the main body being provided with a mounting groove for mounting a slider, the main body being further provided with a main body mating surface for mating with the slider, characterized in that, The shaping tool is configured to be mounted in the mounting groove, and the shaping tool is provided with a shaping matching surface configured to be in interference fit with the body matching surface to shape the body.

2. The shaping tool of claim 1 wherein, The shaping tool is provided with a shaping groove, and a groove side wall of the shaping groove is provided with the shaping matching surface. And / or, the outer side wall of the shaping tool is provided with the shaping matching surface.

3. The shaping tool of claim 2, wherein The mounting groove is provided with a boss, a side surface of the boss is provided with the body matching surface, the shaping tool is provided with a shaping groove, a groove side wall of the shaping groove is provided with the shaping matching surface, and the boss is inserted into the shaping groove.

4. The shaping tool of claim 3, wherein The body has a central axis, the mounting groove is provided with two bosses, the two bosses are symmetrically distributed along the central axis of the body, one of the bosses is provided with oppositely arranged first and second matching surfaces, the other of the bosses is provided with oppositely arranged third and fourth matching surfaces, and the body matching surface comprises the first, second, third and fourth matching surfaces. The groove side wall of the shaping groove is provided with oppositely arranged first and second shaping surfaces and oppositely arranged third and fourth shaping surfaces, the shaping matching surface comprises the first, second, third and fourth shaping surfaces, the first shaping surface is configured to be in interference fit with the first matching surface, the second shaping surface is configured to be in interference fit with the second matching surface, the third shaping surface is configured to be in interference fit with the third matching surface, and the fourth shaping surface is configured to be in interference fit with the fourth matching surface.

5. The shaping tool of claim 3 wherein, The groove side wall of the shaping groove is provided with the shaping matching surface, and the outer side wall of the shaping tool is configured to be in gap fit with the groove side wall of the mounting groove.

6. The shaping tool of claim 2 wherein, The outer side wall of the shaping tool is provided with the shaping matching surface, and the side wall of the mounting groove is provided with the body matching surface.

7. The shaping tool of claim 6 wherein, The side wall of the mounting groove is provided with oppositely arranged first and second matching surfaces and oppositely arranged third and fourth matching surfaces, and the body matching surface comprises the first, second, third and fourth matching surfaces. The outer side wall of the shaping tool is provided with oppositely arranged first and second shaping surfaces and oppositely arranged third and fourth shaping surfaces, the shaping matching surface comprises the first, second, third and fourth shaping surfaces, the first shaping surface is configured to be in interference fit with the first matching surface, the second shaping surface is configured to be in interference fit with the second matching surface, the third shaping surface is configured to be in interference fit with the third matching surface, and the fourth shaping surface is configured to be in interference fit with the fourth matching surface.

8. The shaping tool of any one of claims 1 to 7, wherein, The frictional force between the shaping matching surface and the body matching surface is 5N-15N.

9. A coupling, characterized by Comprise: a body, the body is provided with a mounting groove at each of the opposite ends, and the body is further provided with a body matching surface; the body is configured to be shaped in advance by a shaping tool, and a shaping matching surface of the shaping tool is configured to be in interference fit with the body matching surface; Two sliders, two of the sliders are respectively installed in two of the installation grooves, the slider is provided with a slider matching surface, the slider matching surface is in interference fit with the main body matching surface, and the slider can slide relative to the main body.

10. The coupling of claim 9 wherein, The installation groove is provided with a boss, the side wall of the boss is provided with the main body matching surface, the slider is provided with a groove, and the groove side wall of the groove is provided with the slider matching surface, and the boss is inserted into the groove; The outer side wall of the slider is in clearance fit with the groove side wall of the installation groove; The installation groove and the slider extend along a first direction, in the first direction, the side wall of the boss is in clearance fit with the groove side wall of the groove, so that the slider can slide relative to the main body in the first direction.

11. The coupling of claim 10 wherein, The width of the shaping groove of the shaping tool is greater than the width of the groove; And / or, the groove lip edge of the groove is provided with a fillet.

12. The coupling of claim 10 wherein, The main body has a central axis, two bosses are arranged in the installation groove, and the two bosses are symmetrically distributed along the central axis of the main body. One of the bosses is provided with a first matching surface and a second matching surface arranged oppositely, and the other of the bosses is provided with a third matching surface and a fourth matching surface arranged oppositely. The main body matching surface includes the first matching surface, the second matching surface, the third matching surface and the fourth matching surface. The slider has a central axis, two grooves are arranged on the two sides of the slider respectively, and the two grooves are symmetrically distributed along the central axis of the slider. One of the grooves is provided with a first slider matching surface and a second slider matching surface arranged oppositely, and the other of the grooves is provided with a third slider matching surface and a fourth slider matching surface arranged oppositely. The slider matching surface includes the first slider matching surface, the second slider matching surface, the third slider matching surface and the fourth slider matching surface. The first slider matching surface is in interference fit with the first matching surface, the second slider matching surface is in interference fit with the second matching surface, the third slider matching surface is in interference fit with the third matching surface, and the fourth slider matching surface is in interference fit with the fourth matching surface.

13. The coupling of claim 9 wherein, The side wall of the installation groove is provided with a first matching surface and a second matching surface arranged oppositely, and a third matching surface and a fourth matching surface arranged oppositely. The main body matching surface includes the first matching surface, the second matching surface, the third matching surface and the fourth matching surface. The slider has a central axis, the outer side wall of the slider is provided with a first slider matching surface and a second slider matching surface arranged oppositely, and a third slider matching surface and a fourth slider matching surface arranged oppositely. The slider matching surface includes the first slider matching surface, the second slider matching surface, the third slider matching surface and the fourth slider matching surface. The first slider matching surface is in interference fit with the first matching surface, the second slider matching surface is in interference fit with the second matching surface, the third slider matching surface is in interference fit with the third matching surface, and the fourth slider matching surface is in interference fit with the fourth matching surface.

14. The coupling of claim 9 wherein, The thickness of the shaping tool is greater than the depth of the installation groove; And / or, the main body matching surface is provided with an oil storage groove; And / or, the slider is provided with an axle hole for mounting an axle, the axle hole having a central axis, the slider mating surface being parallel to the central axis of the axle hole.

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